Electromagnetic traction apparatus for street-cars.



No. 647,454. Patented Apr. 10, [900i ELECTROMAGNETIC TRACTION APPARATUSFOR STREET CARS.

a. N, moomz.

(Application filed May 24, 1899.)

(No Moder.)

INVENTOH Er M w.

I ATTORNEY W/ T NE SSE S v Asu on: c m: scams vzrens c0. Puo-L-u'ma, w H

GEORGE NICKOLS MOORE, OF NElV YORK, N. Y.

ELECTROMAGNETiC TRACTION APPARATUS FOR STREET-CARS.

SPECIFICATION forming part of Letters Patent No. 647,454, dated April10, 1900.

Serial No- 718,065. (No model.)

To 00% whom, it may concern:

Be it known that LGEORGE NIoKoLs MOORE, a citizen of the United Statesof America, and a resident of New York city, county and State of NewYork, have in vented certain new and useful Improvements inElectromagnetic Traction Apparatus for Street-Cars, of which thefollowing is a specification.

My invention relates to means for increasing the traction of the wheelsof motor-cars, and has for its object to utilize the massive metallicrail-supporting iron yokes of the'underground conduit systems in themagnetic circuits employed to increase the traction, such massive bodiesbeing conducive to more powerful magnetic effect, as hereinafterdescribed, reference being made to the accompanying drawings, in which--Figure 1 is a plan View of part of a railwaytrack of the kind in whichthe massive iron yokes mentioned are used, with two pairs of wheels andaxles thereon equipped with means for causing traction-increasingmagnetic cirunits in accordance with my invention. Fig. 2 is atransverse section of the roadway, showing one of said pairs of wheelsand its axle and helix in front elevation, with part of the helix brokenout.

A represents a massive yoke such as now commonly used in the conduitsystems of roadways, being sunk to a considerable depth in the ground Z2and supporting the rails 0, slotplates d, and the pavement-supportingplates 6, with stays f, in the usual form of construction.

9 represents two pairs of car-wheels, with axles h, on which the car isto be mounted in any approved way. The axles are coupled bya truck-frame1 of any approved construction, and around each axle is a helix j, saidhelices being wound on spools 70, which are supported by the frame 1' orother suitable support.

The helices are simply coils of wire arranged about the axles of thecar, forming paths through which a current of electricity is passedabout the axles. While the currents of electricity are passing throughthe coils the tendency is to set up in the axles and wheels,

rails, and yokes a high state of magnetism,

which has for its path the wheels, rails, and iron yokes, the paths fromwheels to wheels through the rails being closed by the coils being sowound as to produce like and therefore opposing poles in the railsbetween the wheels,

tively, through the switch m and wires n and i 0, so that whenever it isdesired to increase the traction the energizing-currents of thebatterymay be turned on by setting the switch m in connection with thecontact 19, thereby closing the circuits through the helices,magnetizingthe axles and the massive yokes, the ends of which areconverted into pole-pieces of opposite polarity, forming complete andunbroken magnetic circuits through the helices, axles,wheels, and yokesand causing powerful attraction or adhesion at the points ofcontactbetween the wheels and rails.

In electric cars operated by a motor the energizing-current for thehelices maybe taken from the motor-circuitin any well-known way.

What I claim as my invention is- Magnetic circuits for increasing thetraction of car-wheels consisting of two pairs of car wheels and axles,rails and massive iron yokes supporting the rails in combination with acoil or stationary helix about each axle, said coils being wound forproducing like and therefore opposing poles in the rails between thewheels, to confine the circuits to the yokes.

Signed by me at New York, N. Y., this 15th day of May, 1899.

GEORGE NICKOLS MOORE.

\Vitnesses:

A. O. SCHWEIZER, H. B. CHANNEL.

